20111131002 has 16 divisors (see below), whose sum is σ = 42588277632. Its totient is φ = 6309374400.

The previous prime is 20111130983. The next prime is 20111131037. The reversal of 20111131002 is 20013111102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98583874 + ... + 98584077.

It is an arithmetic number, because the mean of its divisors is an integer number (2661767352).

Almost surely, 2^20111131002 is an apocalyptic number.

20111131002 is an abundant number, since it is smaller than the sum of its proper divisors (22477146630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111131002 is a wasteful number, since it uses less digits than its factorization.

20111131002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197167973.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 20111131002 its reverse (20013111102), we get a palindrome (40124242104).

The spelling of 20111131002 in words is "twenty billion, one hundred eleven million, one hundred thirty-one thousand, two".